Weld Kyle J, Arzola Jorge, Montiglio Claudio, Bush Anneke C, Cespedes R Duane
Department of Urology, Wilford Hall Medical Center, Lackland AFB, Texas 78236, USA.
Urology. 2008 Jan;71(1):32-5. doi: 10.1016/j.urology.2007.08.061.
To investigate the holding strength and slippage of Lapra-Ty clips on various suture types and sizes.
Using an automated materials testing system with the Lapra-Ty in a fixed position, Lapra-Ty holding strength and displacement were determined with 0, 2-0, 3-0, and 4-0 Vicryl, Monocryl, and polydioxanone suture (PDS). To simulate clinical application, Lapra-Tys were also tested by applying a load to these sutures after being passed through a full-thickness layer of tautly suspended fresh porcine bladder tissue. Three trials were performed with each suture type and size.
The Lapra-Ty holding strength with Vicryl suture was significantly higher than with Monocryl or PDS of the same suture size in bladder tissue trials. Monocryl suture had a significantly higher displacement than Vicryl or PDS of the same suture size in bladder tissue trials (except for 4-0 Monocryl and PDS having insignificantly different displacements). Lapra-Tys slipped off Vicryl, Monocryl, and PDS in 25%, 67%, and 67% of their respective trials. Lapra-Tys did not slip during any of the trials with 2-0 suture of any type or 3-0 Vicryl. Lapra-Tys with holding strengths on suture less than approximately 8 Newtons (N) slipped and greater than 8 N pulled through the bladder tissue without slipping.
The optimal suture type and size to maximize Lapra-Ty holding strength and minimize slippage was determined to be 2-0 and 3-0 Vicryl, 2-0 Monocryl, and 2-0 PDS. Monocryl suture stretches more than Vicryl and PDS at higher loads.
研究Lapra-Ty夹在不同类型和尺寸缝合线上的夹持强度和滑动情况。
使用自动材料测试系统,将Lapra-Ty夹固定在一个位置,测定其在0、2-0、3-0和4-0的薇乔线、爱惜康单股线和聚二氧六环酮缝线(PDS)上的夹持强度和位移。为模拟临床应用,在将这些缝线穿过一层紧密悬挂的新鲜猪膀胱组织全层后,对Lapra-Ty夹施加负荷进行测试。每种缝线类型和尺寸进行三次试验。
在膀胱组织试验中,薇乔线的Lapra-Ty夹夹持强度显著高于相同缝线尺寸的爱惜康单股线或PDS。在膀胱组织试验中,爱惜康单股线的位移显著高于相同缝线尺寸的薇乔线或PDS(4-0的爱惜康单股线和PDS位移差异不显著除外)。Lapra-Ty夹在其各自试验中,分别有25%、67%和67%从薇乔线、爱惜康单股线和PDS上滑落。在任何使用2-0任何类型缝线或3-0薇乔线的试验中,Lapra-Ty夹均未滑落。夹持强度小于约8牛顿(N)的Lapra-Ty夹从缝线上滑落,而大于8 N的则穿过膀胱组织而未滑落。
确定能使Lapra-Ty夹夹持强度最大化并使滑动最小化的最佳缝线类型和尺寸为2-0和3-0薇乔线、2-0爱惜康单股线和2-0 PDS。在较高负荷下,爱惜康单股线比薇乔线和PDS伸展得更多。